"I like pineapples, just not on pizza. I do not have the power to make laws that forbid people to put pineapples on pizza," Jóhannesson wrote. "Presidents should not have unlimited power. I would not want to hold this position if I could pass laws forbidding what I don't like. I would not want to live in such a country."

Jóhannesson, 48, is Iceland's youngest president. He also, "prefers seafood" on his pizza.